Polishing machine



3 Sheets-Sheet l R. M. KlNcAlD POLISHTNG MACHINE- Filed July 27, 1929 `lune 7, 1932.

INVENTOR NJ /L-ScSELL /1/1. /f/'A/OA/D.

l ATTORNEY June 7, 1932. R, M. KINCAID POLISHING MACHINE 5 Sheets-Sheet '2 Filed July l27, 1929 June 7, 1932. R. M. KmcAlD POLISHING MACHINE Filed July 27, 1929 3 Sheets-Sheet I5 l INVENTOR /gELL M. /f//VA/D.

of E ATTORNEY Patented June 7, 1932 UNITED .STATES .PATENT OFFICE A g RUSSELL M. KINCAID, F DETROIT', MICHIGAN, -ASSIGNOR TO CHRYSLER CORPORA- 5. TION, 0F DETROIT, MICHIGAN, A CORPORATION OF DELAWARE roLIsHING MACHINE Application led July A27,

This invention relates ,to a polishing 'machine, and `more particularly to a machine in which a `full sized vehicle body may be inserted and th'e major portion of its surface polished at one time. i ,Y

An .'mportalnt object yot the invention is to provide a machine which will polish or sand the major yp'o'rti'on of the vehicle body mechanically, requiring very Vlittle manual labor in finishing vthe body after it has been removed from the polishing machine.

Another object of theV invention is to provide a machine which readily adapts `itseli to the irregular surfaces of a vehicle body 15 and to arrange thev abrasive material in such a manner that :all portions thereof are resilientlypressed against the surface of the body by Aequaltension on all portions.

Other objects and advantages of the invention will more fully appear from the following description taken in -connection with the accompanying drawingsin which:

. Fig. 1 is a side elevation of a machine showing one adaptation of my device.

Y Fig. 2 is a plane view of Fig. 1.

- Fig. v3 isva fragmentary view showing'v a portion of the ,machine and a vehicle body in section. Y

Fig. 4 is a detail showing one of the abrasive uni-ts in section.

Fig. 5 `is .a side view of a portion of the abrasive units showing the .arrangement of the abrasive elements.

Referring now tothe drawings and .more particularly to Fig.. 1., I have provided a rectangular .frame 110 supporting at one end thereof a driving .member such :as an electric motor 12. A power transmission mechanism is 'sh-own at 14, vand is adapted to be driven by the motor 1.2 through a belt 16.

As shown in Fig. 2, the frame 'conforms generally to the curvature of la vehicle body, and pone side :of the rame is pivot-ed as at 18 on a base-20toswing outwardly orthe reception of a vehicle body. i The upper longitudinal member of the frame 10 is provided with guide blocks 22 land the lower longi- 4tudinal.member is provided with guide blocks 24, and longitudinal track members 26. Be-

1929. Serial No. 381,622.

-tweenthe guide blocks 22 and 24I have supported abrasive units which are'comparatively large 'and adapted to cover one provided rollers 34V .which are carriedby the track members 26. Each unit is connected together by links 36V.,

'On the forward frame member 28 I'have provided a connecting rod 38 'which is mounted on an eccentric carried by a shaft 42 fand driven by the transmission mechanism 14. It will be understood thatwhen 'the shaft 42, is rotated, the eccentric 40 recijpro'ca'te's the rod 38, and it in turn, through its connection to the frame member 28, recip'rocatesthe frame 28 in a horizontal plane along the sides of the vehicle body. The yother units, being attached to theforward unit through links 36, move in a horizontal plane with the forward frame member 28. i

It will be understood that the: number, size and shape of these units may be varied, as .for example, the rea-r unit V44 is shown considerably smaller than the intermediate units for polishing a smaller panel suchas the panel above the wheel house.

AsA shown in Fig. 2, one side of the trame f 10 is pivotallyfmounted,and the opposite Aside isstationary. To the stationary side, I have pivotally mounted another panel Jfor polishing the rear surface of the vehicle body'. i

In the illustrated embodiment of this device, a separate driving mechanism isshown as jat 46 or reciprocating the abrasive unit. A bolt 48 pivotally mounted on the one side of the supporting frame 10 is adapted toy be engaged 'in a bracket. 50 for locking the rear unit to the frame 10 after a vehicle body has been placed in themachine. The movable :frame 10 is also provided with a lbolt-52 which members, one at the side and the one. at the back, may be swung out of their normal position and the body inserted vagainst the stationary member 10. The swinging panels are then brought into engagement with the body and locked-in position. The motor is then started and the abrasive units reciprocate in a horizontal plane to polish the several panels or parts of the vehicle body.

Referring more particularly to a` specific construction for resiliently urging the abrasive blocks against the surface of the body, I have shown a rigid plate 56 supported on Athe frame 28 by brackets 30. This plate 56 conforms generally to the curvature of the body and forms a backing plate for al plurality of springs 60. A flexible pad 62, preferably of rubber is positioned onl the outer ends of the springs`60 `and is adapted to receive a plurality of abrasive blocks 64, preferably of cylindrical formation arranged in vertical rowsand in staggered relation.

, If desired, the rubber pad 62 may have a backing member such as a leather -pad 66, the two beingsecured together by bolts 68. The opposite ends of the springs 60 are provided with metallic members 70 to formA suitable seats for the ends of the spring.V Angle members 72 are provided, one on the plate 56 and `one on the leather pad 66 in engagement with each other, to support the abrasive elements vertically. Angle members 74 extending at right angles to the angle member 72 have been arranged in a vertical position to guide the abrasive elements horizontally.

Thefabrasive elements are comparatively thick and are formed of such materialthat willv wear down fast enough to prevent {ill- Y ing or clogging of the abrasive material with particles removed from the surface of the body, but is hard enough to prevent wearing away too rapidly. The abrasive elements are detachably secured to the several units by being frictionally held in openings in the rubber pad 62.

`Various changes including the size, shape and arrangement of parts may be made without departing from vthe spirit o'f my invention, and it is not my intention to limit its scope other than by the terms of the appen ded claims.

What I claim is:

1. A machine of the class described, comprising a frame construction having side portions spaced to receive a vehicle body there between, a plurality of interconnected movable members on each side portion and a plurality of abrasive members on saidA movable members. v

v2. A machine of the class described, comprising oppositely spaced movable members,

a rigid plate on each of said members, a flexible pad adjacent the inner surface of each rigid plate, resilient means between said pad and said plate and a plurality of abrasive menbers on the inner surface of said flexible pa s. Y Y

3. yA machine ofthe class described, comprising a supporting structure having two side portions oppositely spaced for the reception of a vehicle body therebetween, a' plurality of movable members on each of said portions conforming generally to the contour ofthe vehicle body, and a plurality of abrasive members on the inner surface of each `movable member.

,4. Amachine of the class described, comprising a supporting structure havingtwo side portions oppositely spaced for the reception of a vehicle body therebetween, a plurality of movable members on 'eachy of said portions conforming generally to the contour of the vehicle body, a flexible pad resiliently supported on the inner surface of each movable member, and a plurality of -abrasive members on the inner surfaces of said flexible ads. f l Y p 5. A machine of the class described, comprising a frame structure having side portions spaced for the reception. of a vehicle body therebetween, a plurality of reciprocat-v ing members guided in the side portions of `said frame structure, a rigid plate on each of said reciprocating members conformingvgenerally to the shape-of the side walls of the vehiclejbody, a iexiblepad at the inner surface of said rigid plate, resilient means between said flexible `pad andl saidvrigidplate and a plurality of abrasive members detachably supported on the inner face of'said flexible member. Y

6. A machine ofthe class described,'comprising a frame .structure having side p0rtions spaced for the reception of ya vehicle body, one of said side portions bein pivotally mounted, a plurality of movab e members carried by said sideportions, and abrasive members on the inner surface of lsaid movable members. y,

7 A machine of the class described, comprising a frame structure having side por- 'Y tions and an end portion, said side portions being oppositely spaced and, said end portion being pivotally mounted relative to said side portions for the reception of a vehicle 

